Guide · body · 3 min read
Do you actually need eight glasses of water — the essentials, when you have tried everything else
Eight glasses is a number with no particular evidence behind it. Thirst and urine colour are better guides.
Start here
A short explanation first, because knowing why makes the doing easier.
This assumes you have already tried the obvious things.
If you only do one thing from this page, do the first point below. It is first because it removes the most friction for the least effort.
What helps
Drinking more than you need does not improve skin, concentration or health. It mostly increases trips to the toilet.
Food supplies a meaningful share of your water, especially fruit and vegetables.
There are real exceptions: hot weather, exercise, illness, pregnancy, and some medications. In those cases thirst lags behind need.
What to do when it does not work
Tea and coffee count. The idea that they dehydrate you is largely wrong at normal intakes.
Your kidneys are extremely good at telling you what they need. Thirst is a reliable signal for healthy adults.
Pale straw-coloured urine is the simplest check. Dark yellow means drink more; completely clear means you can stop.
Questions people ask
Can you drink too much water?
Yes, though it is rare. Extremely large amounts in a short time can dilute blood sodium, which is dangerous.
Written for people who want the practical version. No accounts, no tracking, no newsletter wall.
If this is not the angle you need, try How to get through the first hour without your phone — an honest guide, when you feel restless rather than tired, The five minutes after a difficult meeting — the short version, when you are somewhere noisy or When the inner voice will not let something go, step by step, when you have been putting it off.